Pyridoxine is one of the compounds that can be called vitamin B6, along with Pyridoxal and Pyridoxamine. It differs from pyridoxamine by the substituent at the '4' position. It is often used as 'pyridoxine hydrochloride'.

It is given to patients taking Isoniazid to combat the toxic side effects of the drug. Pyridoxine is given 10-50 mg/day to patients on INH (Isoniazid) to prevent Peripheral neuropathy and CNS effects that are associated with the use of isoniazid.

Vitamin B6 can be compounded into a variety of different dosage forms. It can be used orally as a tablet, capsule, or solution. It can also be used as a nasal spray or for injection when in its solution form. The following is a procedure for producing a diluting solution of vitamin B6, taken from the USP/NF.

"Diluting Solution: Dissolve 25g of edentate disodium in 1000mL of water and mix. Dissolve an accurately weighed quantity of USP Pyridoxine Hydrochloride RS in Diluting Solution, and dilute quantitatively, and stepwise if necessary, with Diluting Solution to obtain a Solution having a known concentration of about 0.024mg/mL."

Source: Council of Experts. USP/NF. 2006 Ed.
Rockville, MD: The United States Pharmacopeial Convention; 2005.